prove that the tangent of circle is perpendicular to radius through the pont of contact. (with diagram )
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prove that the tangent of circle is perpendicular to radius through the pont of contact. (with diagram )
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Answer:
Let O be the centre of the circle, let ℓ be a tangent line, and let P be the point of tangency. ... Draw the line through O which is perpendicular to ℓ. Then this line meets ℓ at a point Q≠P. Note that Q is outside the circle.